1) 45x^3+5x the GCF is 5x because that is a factor of both. The answer would be 5x(9x^2+1)
2) u^2-5u+6 factoring is finding what multiplies to the last number to add to the middle number. Those numbers are -3 and -2. the answer would be (u-3)(u+2)
3) m^2-49 difference of perfect squares answer is (m+7)(m-7)
4) x^5+4x^4+3x^3 GCF is x^3 so it's x^3(x^2+4x+3) Factor that and it's x^3(x+3)(x+1)
